How to paint a gradient color in Android on a Canvas with the color changing?

Question

I need to paint the background of my Canvas one color with shading/gradient applied, but each onDraw call I would like to potentially change the color.

I am having trouble doing this without creating a new object each onDraw call. Anyone have any ideas? If I use drawPaint() and set a new shader() to my paint, then I have created a new shader object and if I create a new GradientDrawable() I have as well. I want to avoid GC.

I thought I could reuse one GradientDrawable() object and call the .setColor() method, but this just resets any gradient data associated it and paints the drawable as that solid color.

Anyone?

Answer 1

Unfortunately you have to create a new LinearGradient everytime. Note that you don't have to use a GradientDrawable, you can draw the shape yourself with a Paint on which you set the shader.